There is a long story behind this but I spent an entire day in the east end of Deadman testing anchors of a Beneteau 505. The boat had an 80 b CQR, we brought down a 50 lb aluminum Spade and borrowed a Bruce and a plow pattern. Wind was a steady 10 to12 knots across the low section of Caby Point. We would drop an anchor on a 6:1 scope, mark the point with a weighted pool noodle, backed down at 2500 RPM, mark where it set with nother noodle. After 30 minutes we measured to see if it dragged. The CQR and the plow both moved an average of 6 feet. The Bruce about half that and the Spade none measured.

We repeated the testing at Mancheneel Bay up near Cistern Point which is notorious for poor holding and got similar results. From that I would rate Deadman at least as poor holding as Cooper Island.